/Engine/Source/Runtime/MovieScene/Public/EntitySystem/MovieSceneEntityFactory.h
the inverse is not implied (ie B can still exist without A)
void DefineMutuallyInclusiveComponents ( [FComponentTypeID](API\Runtime\MovieScene\EntitySystem\FComponentTypeID) InComponentA, std::initializer_list< [FComponentTypeID](API\Runtime\MovieScene\EntitySystem\FComponentTypeID) > InMutualComponents )